Setting up an official (or unofficial) mirror is described within the official mirror page. However, setting up your own mirror via SVN is possible too and is especially helpful for those working on the PHP website.

1. Checkout phpweb (svn co http://svn.php.net/repository/web/php/trunk phpweb)
2. Within phpweb, run this:

   <?php
   // Note: This is a complete hack
   // Mirror to steal from
   $mirror = 'http://www.php.net/';
    
   // Files phpweb needs (typically from rsync box)
   $files = array('include/mirrors.inc', 'include/countries.inc', 'include/pregen-events.inc', 'include/pregen-news.inc', 'include/pregen-confs.inc');
    
   foreach ($files as $file) {
   	file_put_contents($file, file_get_contents($mirror . $file));
   }
    
   // Another required file, let's create it ourselves
   file_put_contents('include/last_updated.inc', '<?php $LAST_UPDATED=' . time() . '; ?>');
   ?>

3. Make a virtual host, see The official mirror page
4. If wanting the PHP Manual too, either:
   • Build it
   • Rsync it
   • Download it